The major thing before purchasing a CCTV system is to find what is the purpose of your CCTV camera. For Example Whether you need it out side or inside the home or somewhere else. You also have to be sure that do you need it for night.
CCTV systems have 3 main elements. The DVR recorder, the individual CCTV cameras and accessories such as leads, power supplies and so on.
DVR buying guide
The Digital Video Recorder or DVR is an industry specific product central to any CCTV system. It stores footage from the cameras, arranges live camera images on screen, handles playback of previously recorded material and in the case of more modern DVRs allows remote access to your CCTV system via the internet.
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